Lawrence Craven, a doctor from the USA, is the author of several published reports, one of _______ introduced the idea in 1953 _______ aspirin could reduce the risk of heart attacks.
Fifteen minutes I can spare to talk over this matter with you.
_________ person like him won't be simply satisfied with progress that has been mode.
When I reached home, my husband was lying on the floor, ________ the kids with toys.
The H1N1 flu spread very quickly at the beginning, __________, many people were ill.
I thought it was __________ to donate money to this fund.